package io;/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

import packet.RawPacket;

import java.io.DataInputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Project  : rtx
 * Author   : solosky < solosky772@qq.com >
 * Created  : 4/7/14
 * License  : Apache License 2.0
 */
public class PacketInputStream extends FilterInputStream {
    private DataInputStream din;

    public PacketInputStream(InputStream in) {
        super(in);
        this.din = new DataInputStream(in);
    }


    public RawPacket readPacket() throws IOException {
        RawPacket p = new RawPacket();
//        byte[] buff = new byte[1024];
//        int len = read(buff);
//        System.out.println("read: " + len+", data:" + util.Util.convertByteToHexString(buff, 0, len));

        p.setHead(din.readByte());
        p.setLen(din.readUnsignedShort());
        p.setVer(din.readUnsignedShort());
        p.setCmd(din.readUnsignedShort());
        p.setSeq(din.readUnsignedShort());
        p.setUin(din.readInt());

        int len = p.getLen() - 0xe;
        if(len> 0){
            byte[] data = new byte[len ];
            din.read(data);
            p.setData(data);
        }
        p.setTail(din.readByte());
        return p;
    }
}
